Abstract
A three-electrode lipid biosensor that simultaneously measures the total cholesterol (CHO), triglyceride (TG), and HDL cholesterol (HDL-C) in standard serum has been developed. The lipid biosensor is designed for clinical use where production cost, low sample requirement, portability, stability, and speed are high priorities. The device design filters out blood cells and lipoproteins from the serum, where the target molecules are catalyzed by enzymes encapsulated in carboxymethyl cellulose (CMC) to produce electron mediators, potassium ferrocyanide. These electron mediators were subsequently detected by amperometric determination. The sensor exhibit high selectivity towards the targets and can measure the target lipids in 4 min with 10 µL of serum. Lastly, the device can be stored up to 18 months with a minimal decrease in catalytic efficiency.
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Data availability statement
The dataset generated during the current study are not publicly available but are available from the corresponding author on reasonable request.
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Acknowledgements
We are grateful to Dr. Shunsuke Fujii from AIST for his support and technical input on our project.
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Uemura, T., Yamazaki, H., Itoh, T. et al. Enzyme sensor for simultaneous determination of cholesterol, triglyceride and HDL cholesterol in serum. ANAL. SCI. 38, 1189–1197 (2022). https://doi.org/10.1007/s44211-022-00148-w
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DOI: https://doi.org/10.1007/s44211-022-00148-w